Plastic anti-falling device for guide angle of CFB (circulating fluid bed) boiler

Abstract

The utility model relates to the technical field of CFB boilers, in particular to a plastic anti-falling device for a guide angle of a CFB boiler. The CFB boiler guide angle plastic anti-falling device comprises a guide angle, the two sides of the guide angle are connected with an inclined air inlet baffle and a cylinder structure respectively, the cylinder structure is connected with a vertical air inlet baffle, the vertical air inlet baffle is located on the side away from the inclined air inlet baffle, and a wear-resistant plastic lining layer and a base body layer are arranged in the guide angle. According to the device, the buffer layer, the transition layer, the anchoring columns and the anchor point hooks are matched for use, so that the high temperature resistance and impact resistance of the guide angle are greatly improved; and through cooperative use of the cooling water pipeline and the transition layer, when hot air enters the cylinder structure for the first time, the temperature difference of the inner wall of the cylinder structure is buffered, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to CFB boiler technical field, concretely is CFB boiler guiding angle plastic anti -drop device. BACKGROUND

[0002] CFB boiler is circulating fluidized bed boiler, and its working principle is: fuel mixes with air, and after high temperature, makes fuel particle suspend in hearth and forms fluidized bed, and fuel particle rolls up and down in hearth, increases the contact area with oxygen, thereby improves combustion efficiency.Simultaneously, fuel particle occurs pyrolysis, gasification etc. at high temperature, and produces combustible gas, further improves combustion efficiency.

[0003] In actual use process, hot air carrying combustion particle in CFB boiler can enter cylindrical structure through air inlet pipeline, and air inlet pipeline and cylindrical structure are generally inclined to enter, and the connecting place of pipeline and cylindrical structure is guiding angle.In the high speed hot air passes through guiding angle, a few sand or unburnt fuel particle in wind can seriously abrade it, and when hot air enters cylindrical structure for the first time, because temperature difference is too large, hot air can cause the inner wall of guiding angle and cylindrical structure to be unevenly heated, thereby affecting its service life. CONTENT OF THE UTILITY MODEL

[0004] According to the deficiency in above prior art, the utility model aims at providing a CFB boiler guiding angle plastic anti -drop device, which greatly improves the high temperature resistance and impact resistance of guiding angle by the cooperation of buffer layer, transition layer, anchor column and anchor point hook; the cooperation of cooling water pipeline and transition layer plays a buffering role on the temperature difference of the inner wall of cylindrical structure when hot air enters for the first time, thereby improving its service life.

[0005] The utility model is implemented by the following technical solutions:

[0006] The CFB boiler guiding angle plastic anti -drop device, including guiding angle, the two sides of guiding angle are connected with inclined air inlet baffle and cylindrical structure respectively, the cylindrical structure is connected with vertical air inlet baffle, the vertical air inlet baffle is located on the side away from the inclined air inlet baffle, and the inside of guiding angle is equipped with wear -resisting plastic lining layer and matrix layer.

[0007] The outside of guiding angle, inclined air inlet baffle, cylindrical structure and vertical air inlet baffle is equipped with matrix wall, and cooling water pipeline is arranged between vertical air inlet baffle and matrix wall.

[0008] The guiding angle is equipped with arc metal bumper block, and the arc metal bumper block is located on the side close to the cylindrical structure.The arc metal bumper block is used to reduce the impact of particles on guiding angle.

[0009] The wear-resistant plastic lining layer is provided with a protective coating on the top, and a buffer layer and a transition layer are arranged between the wear-resistant plastic lining layer and the base layer, and the buffer layer is arranged on the side close to the wear-resistant plastic lining layer.

[0010] The buffer layer is arranged between the wear-resistant lining and the base material, and is mainly used for absorbing and dispersing impact force. When high-speed hot air carrying sand grits impacts the wear-resistant lining, the impact force is transmitted to the base material through the buffer layer, and the buffer layer can effectively reduce the direct damage of the impact force to the base material. The ceramic fiber material is used as the buffer layer. The ceramic fiber has good flexibility and elasticity, and can deform to a certain extent to absorb energy. At the same time, it also has the characteristics of high temperature resistance and heat insulation, and will not lose the buffering performance due to high temperature. The alumina ceramic fiber has a fiber structure which can effectively disperse the impact force and still maintain stable physical properties in a high temperature environment.

[0011] The inside of the wear-resistant plastic lining layer is provided with a fixing net, and the fixing net is connected with an anchoring column, the anchoring column penetrates through the buffer layer and the transition layer, and is connected with the base layer.

[0012] The transition layer is used to solve the peeling problem caused by the difference in the thermal expansion coefficients between the wear-resistant lining and the base material. If the thermal expansion coefficients of the wear-resistant lining and the base material are different, thermal stress will be generated between them when the temperature changes. The transition layer can adjust the thermal stress, so that the two can work better together. The metal ceramic composite material is used as the transition layer. The composite structure of adding ceramic particles in the metal matrix can control the thermal expansion coefficient of the material by adjusting the proportion of metal and ceramic, so that the thermal expansion coefficient is between the wear-resistant lining and the base material. In this way, when the temperature changes, the transition layer can effectively relieve the thermal stress and prevent the wear-resistant lining from peeling off due to the thermal stress.

[0013] The connection between the fixing net and the anchoring column is provided with an anchor point hook, and the connection between the anchoring column and the base layer is provided with an anchor point hook.

[0014] The opening degree of the guide angle is 30-70°.

[0015] The inclined air inlet baffle, the vertical air inlet baffle and the upper and lower sealing structure constitute the air inlet pipeline.

[0016] The working principle of the utility model is that:

[0017] After the CFB boiler is started, the hot air carrying combustion particles enters the cylindrical structure through the air inlet pipeline, the cooling water enters the cooling water pipeline to cool the cylindrical structure, the buffer layer is used for absorbing and dispersing impact force, and the transition layer is used to solve the peeling problem caused by the difference in the thermal expansion coefficients between the wear-resistant lining and the base material.

[0018] Compared with the prior art, the utility model has the advantages that:

[0019] The CFB boiler guide angle plastic anti-detachment device of this utility model, through the combined use of buffer layer, transition layer, anchor column and anchor hook, greatly improves the guide angle's resistance to high temperature and impact; through the combined use of cooling water pipe and transition layer, it buffers the temperature difference of the inner wall of the cylindrical structure when hot air enters for the first time, thus improving its service life. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the CFB boiler guide angle plastic anti-detachment device of this utility model;

[0021] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 This is a schematic diagram of the internal structure of the guide angle of this utility model;

[0023] In the diagram: 1. Guide angle; 2. Angled air inlet baffle; 3. Cylindrical structure; 4. Vertical air inlet baffle; 5. Base wall; 6. Anchor column; 7. Arc-shaped metal anti-collision block; 8. Cooling water pipe; 9. Protective coating; 10. Wear-resistant plastic lining layer; 11. Buffer layer; 12. Transition layer; 13. Base layer; 14. Fixing net; 15. Anchor hook. Detailed Implementation

[0024] To make the objectives and technical solutions of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] Example 1

[0026] like Figure 1 As shown, the CFB boiler guide angle plastic anti-detachment device includes a guide angle 1, with an inclined air inlet baffle 2 and a cylindrical structure 3 connected to both sides of the guide angle 1. A vertical air inlet baffle 4 is connected to the cylindrical structure 3, and the vertical air inlet baffle 4 is located on the side away from the inclined air inlet baffle 2. Figures 2-3As shown, the guide angle 1 has a wear-resistant plastic lining layer 10 and a base layer 13 inside. Base walls 5 are provided on the outer sides of the guide angle 1, the inclined air inlet baffle 2, the cylindrical structure 3, and the vertical air inlet baffle 4. A cooling water pipe 8 is provided between the vertical air inlet baffle 4 and the base wall 5. An arc-shaped metal anti-collision block 7 is provided on the guide angle 1, located near the cylindrical structure 3. The arc-shaped metal anti-collision block 7 is used to reduce the impact of particles on the guide angle 1. A protective coating 9 is provided above the wear-resistant plastic lining layer 10. A buffer layer 11 and a transition layer 12 are provided between the wear-resistant plastic lining layer 10 and the base layer 13, with the buffer layer 11 located near the wear-resistant plastic lining layer 10. A fixing mesh 14 is provided inside the wear-resistant plastic lining layer 10, and anchor posts 6 are connected to the fixing mesh 14. The anchor posts 6 penetrate the buffer layer 11 and the transition layer 12 and are connected to the base layer 13. Anchor hooks 15 are provided at the connection between the fixed net 14 and the anchor post 6, and anchor hooks 15 are provided at the connection between the anchor post 6 and the base layer 13. The opening of the guide angle 1 is 45°.

[0027] Example 2

[0028] like Figure 1 As shown, the CFB boiler guide angle plastic anti-detachment device includes a guide angle 1, with an inclined air inlet baffle 2 and a cylindrical structure 3 connected to both sides of the guide angle 1. A vertical air inlet baffle 4 is connected to the cylindrical structure 3, and the vertical air inlet baffle 4 is located on the side away from the inclined air inlet baffle 2. Figures 2-3 As shown, the guide angle 1 has a wear-resistant plastic lining layer 10 and a base layer 13 inside. Base walls 5 are provided on the outer sides of the guide angle 1, the inclined air inlet baffle 2, the cylindrical structure 3, and the vertical air inlet baffle 4. A cooling water pipe 8 is provided between the vertical air inlet baffle 4 and the base wall 5. An arc-shaped metal anti-collision block 7 is provided on the guide angle 1, located near the cylindrical structure 3. A protective coating 9 is provided above the wear-resistant plastic lining layer 10. A buffer layer 11 and a transition layer 12 are provided between the wear-resistant plastic lining layer 10 and the base layer 13, with the buffer layer 11 located near the wear-resistant plastic lining layer 10. A fixing mesh 14 is provided inside the wear-resistant plastic lining layer 10, and anchor posts 6 are connected to the fixing mesh 14. The anchor posts 6 penetrate the buffer layer 11 and the transition layer 12 and are connected to the base layer 13. Anchor hooks 15 are provided at the connection between the fixed net 14 and the anchor post 6, and anchor hooks 15 are provided at the connection between the anchor post 6 and the base layer 13. The opening of the guide angle 1 is 60°.

[0029] After the CFB boiler is started, hot air carrying combustion particles will enter the cylindrical structure 3 through the air inlet pipe, and cooling water will enter the cooling water pipe 8 to cool the cylindrical structure 3. The buffer layer 11 is used to absorb and disperse the impact force, and the transition layer 12 is used to solve the problem of peeling that may occur between the wear-resistant lining and the base material due to the difference in the coefficient of thermal expansion.

Claims

1. A CFB boiler guide angle plastic anti-falling device, characterized in that, Including the guide angle (1), the guide angle (1) two sides are connected with oblique air inlet baffle (2) and cylinder structure (3) respectively, the cylinder structure (3) is connected with vertical air inlet baffle (4), vertical air inlet baffle (4) is located in the side away from oblique air inlet baffle (2), the guide angle (1) inside is equipped with wear-resistant plastic lining layer (10) and base layer (13); The outer side of the guide angle (1), the oblique air inlet baffle (2), the cylinder structure (3) and the vertical air inlet baffle (4) are provided with the base wall (5), and the cooling water pipeline (8) is arranged between the vertical air inlet baffle (4) and the base wall (5); The upper side of the wear-resistant plastic lining layer (10) is provided with the protective coating (9), the wear-resistant plastic lining layer (10) and the base layer (13) are provided with the buffer layer (11) and the transition layer (12), and the buffer layer (11) is located on the side close to the wear-resistant plastic lining layer (10); The inside of the wear-resistant plastic lining layer (10) is provided with the fixed net (14), the fixed net (14) is connected with the anchor column (6), the anchor column (6) penetrates through the buffer layer (11) and the transition layer (12), and is connected with the base layer (13); The connecting place of the fixed net (14) and the anchor column (6) is provided with the anchor point hook (15), and the connecting place of the anchor column (6) and the base layer (13) is provided with the anchor point hook (15).

2. The CFB boiler guide angle plastic anti-falling device according to claim 1, characterized in that, The guide angle (1) is provided with the arc-shaped metal anti-collision block (7), and the arc-shaped metal anti-collision block (7) is located on the side close to the cylinder structure (3).

3. The CFB boiler guide angle plastic anti-falling device according to claim 1, characterized in that, The opening of the guide angle (1) is 30-70°.

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